oxyrhynchus, Sternarchus Müller [J.] & Troschel [F. H.] 1849:640 [Reisen in Britisch-Guiana; ref. 3072] Essequibo River, Guyana [probably in error]. Holotype (unique): ZMB 4086. Type catalog: Ferraris et al. 2017:[14] [ref. 35236] with date as 1848. For problems with the type locality, see de Santana & Vari 2010:333 [ref. 30785]. Also described in Müller & Troschel 1849:16, pl. 2 (figs. 1-2) [ref. 3073]. •Valid as Sternarchorhynchus oxyrhynchus (Müller & Troschel 1849) -- (Ovchynnyk 1967:33 [ref. 37559], Ortega & Vari 1986:12 [ref. 9708], Mago-Leccia 1994:36 [ref. 21320], Albert & Campos-da-Paz 1998:423 [ref. 23853], Campos-da-Paz 2000:528 [ref. 24452], Albert 2001:112 [ref. 25614], Albert in Reis et al. 2003:501 [ref. 27061], de Santana & Crampton 2006:58 [ref. 28619], de Santana & Vari 2010:330 [ref. 30785], Sarmiento et al. 2014:188 [ref. 35004], DoNascimiento 2016:535 [ref. 34727], Ferraris et al. 2017:[14] [ref. 35236] as 1848, DoNascimiento et al. 2017:68 [ref. 35633], Urbano-Bonilla et al. 2018:72 [ref. 35773], Ochoa et al. 2020:63 [ref. 37781], Meza-Vargas et al. 2021:21 [ref. 39298], Lasso et al. in Lasso & Morales-Betancourt 2022:86 [ref. 40783]). Current status: Valid as Sternarchorhynchus oxyrhynchus (Müller & Troschel 1849). Apteronotidae: Apteronotinae. Distribution: South America: Orinoco River basin (Bolivia, Colombia, Peru and Venezuela); ?Guyana. Habitat: freshwater.